Quote:
Originally Posted by GrouchyAdmin
As already mentioned, almost anything written halfway decently for PHP4 (Using superglobals, very primitive OOP, if at all, not relying on inherited variables) will work fine with PHP5 up through 5.1.x.
They've decided to do some rather stupid shit since like killing the only sane regex library in 6.x, so you may get a few deprecation warnings, but you probably won't need to worry until at least 2011 for that.
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yeah... I used ereg alot. Another thing to mention is that some developers had a bad habit of using short tags which are disabled by default in php 5
<? <-- short tag
<?php <-- long tag